Inhibition of green mold disease in mandarins by preventive applications of methyl jasmonate and antagonistic yeast Cryptococcus laurentii |
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| Institution: | 1. Department of Food Science and Nutrition, Zhejiang University, Hangzhou 310058, People''s Republic of China;2. Fuli Institute of Food Science, Zhejiang University, Hangzhou 310058, People''s Republic of China;3. Chun’an County Agriculture Bureau, Chun’an 311700, People''s Republic of China;1. College of Food Science, Southwest University, Chongqing 400715, PR China;2. Department of Food Science, Cornell University, Stocking Hall, Ithaca, NY 14853, USA;3. Laboratory of Quality & Safety Risk Assessment for Agro-products on Storage and Preservation (Chongqing), Mimnistry of Agriculture, Chongqing 400715, PR China;1. Grupo de Biodiversidad y Biotecnología de Levaduras, Instituto de Investigación y Desarrollo en Ingeniería de Procesos, Biotecnología y Energías Alternativas (PROBIEN, Consejo Nacional de Investigaciones Científicas y Tecnológicas – Universidad Nacional del Comahue), Buenos Aires, 1400 (8300) Neuquén, Argentina;2. Facultad de Ciencias Agrarias, Universidad Nacional del Comahue, Argentina;1. School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, People''s Republic of China;2. Department of Horticulture, Faculty of Agricultural Technology, University for Development Studies, Tamale, Ghana;3. Department of Agricultural, Environmental and Food Sciences, University of Molise, Campobasso, Italy;1. Key Laboratory of Plant Hormones and Development Regulation of Chongqing, School of Life Sciences, Chongqing University, 401331 Chongqing, China;2. Center of Plant Functional Genomics, Institute of Advanced Interdisciplinary Studies, Chongqing University, 401331 Chongqing, China;1. College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, PR China;2. College of Life Science and Engineering, Chongqing Three Gorges University, Chongqing 404100, PR China |
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| Abstract: | The objective of this study was to evaluate the preventive activity of methyl jasmonate (MeJA) alone and in combination with antagonistic yeast in suppressing green mold decay in citrus fruit, and to explore the mechanisms involved. At 100 μmol/L, MeJA inhibited disease incidence and lesion diameter of mold decay compared with the control (P < 0.05) The preventive application of Cryptococcus laurentii at 1 × 108 cells/mL combined with 100 μmol/L MeJA reduced green mold incidence compared to the control and the other treatment groups (P < 0.05) when tested in wounded citrus fruit inoculated with Penicillium digitatum. MeJA and C. laurentii induced higher activity of polyphenol oxidase, peroxidase and catalase than control. Moreover, treatment with MeJA and C. laurentii induced a rise in the mRNA expression level of PR5 (pathogenesis-related protein family 5), which was stronger than in the single-treatment groups and the control. In addition, 100 μmol/L MeJA improved the rapid proliferation of C. laurentii in citrus fruit wounds. This combined treatment can induce natural resistance and stimulate the proliferation of antagonistic yeast on the fruit surface. |
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| Keywords: | Biocontrol Citrus fruit MeJA |
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